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Astrometric Detection of a Low Mass Companion Orbiting the Star AB Doradus

We report submilliarcsecond--precise astrometric measurements for the late-type star AB Doradus via a combination of VLBI(very long baseline interferometry) and Hipparcos satellite data. Our astrometric analysis results in the precise determination of the kinematics of this star, that reveals an orbital motion readily explained as caused by the gravitational interaction with a low-mass companion.

astrometry interferometric kinematics low-mass bro↗

Astrographic Observations of Pheobe from Voyager 2

This article provides the reduced astrographic observations of the ninth Saturnian satellite, Pheobe, derived from star-satellite imaging data acquired by the Voyager 2 spacecraft. The data set contains 8 pairs of spacecraft-centered right ascension and declination observations and includes all of the observations used in Voyager encounter operations.

Astrometry planets satellites Saturn Pheobe solar ↗

Astrometric Techniques

An exoplanet, while perhaps not visible from its direct radiation, can still make its presence known indirectly through its gravitational interaction with its parent star.

interferometry exoplanet astrometry↗